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Q.
In housefly pseudotracheae is found in
UP CPMTUP CPMT 2007
Solution:
Sponging mouthparts are found in the housefly and some other flies to suck up the liquefied food. These flies lack the cutting weapons of the insects that chew the food. They comprise a fleshy and retractile proboscis (formed by labium) consisting of three parts - rostrum, bearing the maxillary palps; haustellum with a middorsal groove, serving as food passage and a ventral heart shaped plate called theca and labellum underside of which is made of numerous incomplete cylindrical tubes the pseudotracheae. Labellum is used to lick the food by its contractile activity. It is first collected into the pseudotracheae and then passed on to the food canal.